CN214153080U - Battery pack - Google Patents

Abstract

The utility model provides a battery pack, including the inside main casing body of acceping the battery module of battery pack, still include detachably and link firmly in the additional casing of the main casing body outside, and because of linking firmly on the main casing body, be formed with inclosed installation space in the additional casing is inside, the BDU and the BMS of battery pack are located the installation space to corresponding to additional casing position, be equipped with the electric connection assembly who is connected with main casing internal electricity in order to supply BDU and BMS on the main casing body. Battery package, through the additional casing of demountable installation outside main casing to arrange BDU and BMS in the additional casing, make BDU and BMS's installation space separate with the main casing body of battery package, when maintaining or changing BDU or BMS, only need install and dismantle additional casing alone can, compare in the scheme of dismantling the main casing body among the prior art, it is more convenient to have the operation, the cost of loading and unloading is also lower advantage.

Description

Battery pack

Technical Field

The utility model relates to a power battery technical field, in particular to battery pack.

Background

In the prior art, because the electric automobile is restricted by the ground clearance, the lower the height control of the battery pack is, the better the electric automobile is, namely, the lower the height of the battery pack is, the larger the ground clearance of the automobile is, and the better the trafficability of the automobile is.

At present, the height of the battery pack can be effectively reduced by integrating the functions of the water cooling plate and the upper cover of the battery pack. However, when the upper cover integrated with the water cooling plate is installed, a heat conducting adhesive is generally used, and when an electrical vulnerable part in a power distribution Box (BDU) and a Battery Management System (BMS) in the Battery pack is repaired and replaced, the upper cover with the adhesive on the Battery pack needs to be removed, so that the operation is very difficult when the upper cover is detached, and the heat conducting adhesive needs to be used when the upper cover is installed again, so that the maintenance cost is high.

In addition, because the positions of the BDU and the BMS are low, when the coolant in the cooling plate leaks, the BDU or the BMS may be submerged, which easily causes a short circuit or thermal runaway of the battery pack, and is not favorable for the safety of the battery pack.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a battery package to maintain and change BDU and BMS, and have better result of use.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a battery pack comprises a main housing body, wherein the main housing body is internally provided with a battery module of the battery pack, and the battery pack further comprises an additional housing body which is detachably and fixedly connected with the outer side of the main housing body, and the additional housing body is fixedly connected with the main housing body, a closed mounting space is formed inside the additional housing body, a BDU and a BMS of the battery pack are positioned in the mounting space and correspond to the position of the additional housing body, and an electric connection component which is electrically connected with the BDU and the BMS in the main housing body is arranged on the main housing body.

Further, the BDU and the BMS are fixed to the additional housing.

Further, the electric connection assembly comprises a socket fixedly connected to the main shell and a plug matched with the socket, the socket is electrically connected to the inner side of the main shell, the plug is connected with the BDU and the BMS, a high-voltage plug-in unit and a low-voltage plug-in unit are arranged in the socket and the plug in a matched mode, the high-voltage plug-in unit forms the BDU and the main shell and is electrically connected to the inner side of the main shell, and the low-voltage plug-in unit forms the BMS and the main shell.

Further, a BCM is arranged in the main shell, and the BMS is electrically connected with the BCM through the low-voltage plug-in unit.

Further, the socket is detachably and fixedly connected to the main housing, and a sealing portion for sealing a gap between the socket and the main housing is arranged between the socket and the main housing.

Further, the sealing portion includes a sealing ring disposed on the socket and fixedly connected to the main housing along with the socket, and the sealing ring is clamped between the socket and the main housing.

Further, the socket is fixedly connected to the main housing through a screw located outside the sealing ring.

Further, the additional housing is fixedly connected to the main housing by bolts.

Furthermore, a water cooling plate is arranged at the top of the battery pack, and the additional shell is positioned at the bottom of the main shell.

Further, the main casing body comprises a lower casing body and an upper cover, the water cooling plate is integrated on the upper cover, and the additional casing body is fixedly connected to the bottom of the lower casing body.

Compared with the prior art, the utility model discloses following advantage has:

battery package, through the additional casing of demountable installation outside main casing, and arrange BDU and BMS in the additional casing, make BDU and BMS's installation space separate with the main casing body of battery package, when maintaining or changing BDU or BMS, only need alone to additional casing install and dismantle can, compare in the mode of dismantling the main casing body among the prior art, not only it is more convenient to operate, and the cost of loading and unloading is also lower, and realize BDU and BMS and the main internal electricity of casing through electric connection component and be connected, do benefit to the safety in utilization that improves the battery package.

In addition, the BDU and the BMS are fixedly arranged on the additional shell, so that the design and implementation are convenient, and the use effect of the BDU and the BMS is improved. The electric connection component adopts a mode that the socket and the plug are matched, so that the electric connection component is convenient to assemble and disassemble and is beneficial to improving the connection effect. The arrangement of the high-voltage plug unit and the low-voltage plug unit is favorable for improving the use effect of the BDU and the BMS.

In addition, the socket is detachably connected to the main housing, so that flexibility in use is improved, and the sealing part is arranged to improve sealing effect between the socket and the main housing. The sealing part adopts a sealing ring, so that the sealing ring has the advantages of mature product and convenience in design and implementation. The screw and the bolt are simple in structure, and the socket and the additional shell are mounted on the main shell conveniently.

This battery package not only does benefit to cooling down the battery package, improves the performance of battery package, still does benefit to the height that reduces the battery package through setting up the water-cooling board, and then increases the ground clearance of vehicle. Go up the simple structure of casing and lower casing, be convenient for machine-shaping, and be connected the annex casing under on the casing, then do benefit to the utilization ratio of structure that improves the casing down.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural diagram of a battery pack according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an additional housing according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a socket according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a plug according to an embodiment of the present invention;

description of reference numerals:

1. a lower housing; 2. a battery module; 3. an upper cover; 4. an additional housing; 5. a plug; 6. a socket; 7. a BDU; 8. a BMS;

101. BCM; 102. mounting a boss;

301. a water-cooling plate;

401. a first housing; 402. connecting the shell; 403. a second housing; 404. a high-voltage output interface; 405. a low voltage output interface; 406. a first mounting hole;

501. a second body; 502. a second limit table; 503. a guide block; 504. a high-voltage line connector; 505. a low voltage line interface; 506. a third seal ring; 507. a second through hole;

601. a first body; 602. a first limit table; 603. a second seal ring; 604. a first through hole; 605. A high-voltage line interface; 606. and a low-voltage wire joint.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms first, second, etc. in this specification are not necessarily all referring to the same item, but are instead intended to cover the same item.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood in combination with the specific situation.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The embodiment relates to a battery pack, which comprises a main shell body of a battery module, wherein the battery module is accommodated in the main shell body, and the battery pack further comprises an additional shell body detachably fixedly connected to the outer side of the main shell body, a closed installation space is formed in the additional shell body, a BDU (brain-based unit) and a BMS (battery management system) of the battery pack are located in the installation space and correspond to the position of the additional shell body, and an electric connection component for electrically connecting the BDU and the BMS with the main shell body is arranged on the main shell body.

Based on the above general description, an exemplary structure of the battery pack described in this embodiment is as shown in fig. 1, the main housing includes a lower housing 1 and an upper cover 3, the two housings are connected to each other in a snap-fit manner to form a cavity for accommodating the battery modules 2, the battery modules 2 are two that are arranged in the cavity in a connected manner, and of course, the number of the battery modules 2 can be increased or decreased adaptively according to specific use requirements. In addition, a Battery Control Module (BCM) is further disposed between the inner walls of the lower case 1 and the corresponding Battery modules 2.

The additional housing 4 in this embodiment is disposed at the bottom of the lower housing 1 to improve the structural utilization of the lower housing 1 and to have a better use effect. In a specific structure, as shown in fig. 1 and 2 in conjunction, the additional case 4 is disposed at the bottom side of the lower case 1 to extend in the length direction of the lower case 1, corresponding to the positive output terminal and the negative output terminal of the battery module 2. The additional case 4 includes a first case 401 having a space formed therein to accommodate the BDU7, a second case 403 having a space formed therein to accommodate the BMS8, and a connection case 402 connected between the first case 401 and the second case 403, and a wire passage communicating between the left and right spaces is formed on the connection case 402.

The BDU7 and the BMS8 can be respectively fixed in the first shell 401 and the second shell 403 by adopting a connection mode in the prior art, a connecting wire for forming electric connection between the BDU7 and the BMS8 is arranged between the BDU and the BMS8, and the connecting wire passes through the wire passage, so that the use effect is better. In addition, two high voltage output ports 404 connected to the BDU7 are provided on the first case 401, and two low voltage output ports 405 connected to the BMS8 are provided on the second case 403 for connecting the battery pack to external electric components.

In order to facilitate the installation of the additional housing 4 on the lower housing 1, in the present embodiment, as shown in fig. 2, a flange is formed integrally and connected to the top edges of the first housing 401, the second housing 403 and the connecting housing 402, a plurality of first installation holes 406 are formed at intervals on the flange, a plurality of installation protrusions 102 having second installation holes are formed at the bottom of the lower housing 1 corresponding to the first installation holes 406, and the installation between the additional housing 4 and the lower housing 1 can be positioned by inserting the installation protrusions 102 into the first installation holes 406. And the fixed installation between the first mounting hole 406 and the second mounting hole is realized by a bolt passing through the first mounting hole and the second mounting hole in sequence and a nut screwed on the bolt.

It is understood that the mounting protrusion 102 may not be provided in this embodiment, and the connection between the first mounting hole 406 and the second mounting hole can be achieved only by bolts passing through the two mounting holes. In addition, a first sealing ring is arranged between the flange of the additional shell 4 and the lower shell 1, each bolt is connected to the outer side of the first sealing ring, and the first sealing ring can be clamped between the flange and the lower shell 1 due to fastening between the bolt and the nut, so that the sealing effect between the additional shell 4 and the lower shell 1 is enhanced.

The electric connection assembly in this embodiment includes the socket 6 that links firmly on lower casing 1 bottom to and match the plug 5 that sets up in socket 6, and socket 6 is connected with the battery module 2 electricity in the main casing, and plug 5 links to each other with BDU7 and BMS8, and the cooperation is equipped with high-pressure grafting unit and low pressure grafting unit in socket 6 and the plug 5, and high-pressure grafting unit constitutes BDU7 and is connected with the electric connection in the main casing, and the low pressure grafting unit constitutes BMS8 and is connected with the electric connection in the main casing.

In detail, referring to fig. 3, the socket 6 includes a first body 601 penetrating therein, a first stopper 602 is provided on an outer wall surface of the first body 601, and the first body 601 is divided into two parts by the first stopper 602. In a preferred embodiment, the socket 6 is detachably attached to the lower case 1 through the first stopper 602. In a specific structure, a third mounting hole is formed in the lower housing 1 corresponding to the bottom of the first body 601, and the bottom of the first body 601 passes through the third mounting hole to be exposed out of the lower housing 1 and inserted into a space defined by the additional housing 4 and the lower housing 1. Four corners of the first position-limiting platform 602 are respectively provided with first through holes 604, corresponding to the first through holes 604, the bottom of the lower casing 1 is provided with four first threaded holes, and the socket 6 is fixed on the lower casing 1 by screwing the first screw passing through the first through hole 604 with the first threaded hole.

In addition, a sealing part for sealing the socket 6 and the lower shell 1 is arranged between the socket and the lower shell 1, and the arrangement of the sealing part is beneficial to improving the sealing performance of the socket 6 and the lower shell 1 in a connection state, thereby being beneficial to improving the use safety of the battery pack. The sealing part is specifically a second sealing ring 603, and the first screws are all located on the outer side of the second sealing ring 603. And along with socket 6 links firmly on lower casing 1, second sealing washer 603 is pressed from both sides tightly between first spacing platform 602 and lower casing 1. The sealing ring is adopted as the sealing part, so that the sealing ring has the advantages of easiness in design and implementation and good sealing effect.

With continued reference to fig. 3, the high-voltage plug unit includes two high-voltage line connectors 605 disposed in the first body 601 and extending along the length direction of the first body 601, and both of the high-voltage line connectors 605 are fixedly disposed with respect to the first body 601. In order to improve the connection effect between the positive output end and the negative output end, the cross-section of the end of each high-voltage wire connector 605 corresponding to the positive output end and the negative output end is U-shaped, which has a simple structure and is convenient for processing and forming. The other end of each high voltage line connector 605 is cylindrical to facilitate connection to the high voltage line connector 504 described below.

The low-voltage plug unit comprises a low-voltage wire connector 606 arranged in the first body 601 and located between the two high-voltage wire interfaces 605, and the low-voltage wire connector 606 is connected with the two BCM101 boards. It is understood that the cross-sectional shape of the two ends of the high-voltage line interface 605 in this embodiment can be adjusted according to specific requirements, as long as the connection relationship can be satisfied.

The structure of the plug 5 in this embodiment is shown in fig. 2 and 4, and includes a second body 501, and a second stopper 502 provided on the second body 501 to partition the second body 501 into two parts. Wherein the plug 5 is detachably mounted on the additional housing 4 through the second limit stop 502. Specifically, the four corners of the second stopper 502 are provided with second through holes 507, four second screw holes are provided in the first housing 401 corresponding to the second through holes 507, and the plug 5 is fixed to the first housing 401 by screwing a second screw inserted through each second through hole 507 into the corresponding second screw hole.

Referring to fig. 3 and 4, the second body 501 is further provided with guide blocks 503 extending along the length direction thereof on the outer side thereof, and corresponding to the guide blocks 503, sliding grooves are provided on the inner wall surface of the bottom of the first body 601, and the effect of the socket 6 between the plug 5 and the socket 6 is improved by guiding and sliding the sliding blocks in the sliding grooves. Preferably, the guide blocks 503 are two of two opposite sides of the second body 501 arranged at intervals, so as to further improve the stability in use.

As shown in fig. 2 and 4, the high-voltage plug unit further includes two low-voltage line interfaces 505 disposed in the second body 501 and fixed to the second body 501. The low voltage plug unit further comprises a low voltage line interface 505 disposed in the second body 501 and located between the two high voltage line connectors 504. And along with the plug-in connection between the plug 5 and the socket 6, the high-voltage wire connector 504 can be inserted into the corresponding high-voltage wire interface 605, and the low-voltage wire connector 606 can be inserted into the low-voltage wire interface 505, so that connection between every two connectors is formed. The BDU7 located in the additional housing 4 is connected to the two high-voltage line connectors 504 on the plug 5 via high-voltage connection lines, and the BMS8 is connected to the low-voltage line connector 505 on the plug 5 via low-voltage connection lines, so that the connection between the BMS8 and the BCM101 is realized.

Preferably, as shown in fig. 2, a third sealing ring 506 is further disposed between the upper surface of the second limit stop 502 and the lower housing 1, each second screw is located outside the third sealing ring 506, and the third sealing ring 506 is clamped between the second limit stop 502 and the lower housing 1 along with the plug-in connection between the plug 5 and the socket 6, so as to have a good sealing and insulating effect.

It should be noted that the first sealing ring, the second sealing ring 603, and the third sealing ring 506 in this embodiment may be separate sealing rings in the prior art, or may be integrated into one of the two members forming the sealing ring clamp, so as to achieve a better sealing effect. For example, a first seal ring is molded onto the flange, a second seal ring 603 is molded onto the first stop 602, a third seal ring 506 is molded onto the second stop 502, etc.

In addition, in order to improve the effect of the battery pack during use, as shown in fig. 1, a water cooling plate 301 is disposed at the top of the battery pack, and preferably, the water cooling plate 301 is integrated on the upper cover 3 to improve the structural utilization rate of the upper cover 3. It can be understood that the water cooling plate 301 in this embodiment is also disposed on the upper cover 3 plate, and the cooling effect on the battery pack can be achieved, but at the same time, the height of the battery pack is also increased, which is not favorable for improving the vehicle trafficability.

When the battery pack of this embodiment is used, the additional housing 4 is first loosened by a turn of bolts that is fixedly connected to the lower housing 1, and then the additional housing 4 is moved downward, and after the additional housing 4 is removed with the plug 5 separated from the socket 6, the BDU7 and the BMS8 are repaired or replaced, and then the additional housing 4 is fixed to the lower housing 1 by bolts.

The battery pack described in this embodiment, by detachably mounting the additional case 4 outside the main case and disposing the BDU7 and the BMS8 in the additional case 4, the mounting space of the BDU7 and the BMS8 is separated from the main case of the battery pack, and when the BDU7 or the BMS8 is repaired or replaced, only the additional case 4 needs to be separately mounted and dismounted, which is not only more convenient to operate, but also lower in mounting and dismounting cost and shorter in time compared to the manner of dismounting the main case in the prior art. Meanwhile, when the coolant on the upper cover 3 leaks, the coolant is not easily introduced into the additional case 4, thereby preventing the occurrence of problems such as a short circuit or thermal runaway of the battery pack due to the coolant's immersion into the BDU7 and the BMS8 as much as possible.

This battery package still realizes the electricity in BDU7 and BMS8 and the main casing through the electric connection subassembly, if BMS8 detects to cause insulation resistance to hang down when low because of the coolant liquid is revealed, then can in time break through BDU7 and the high-voltage line connects the connection between 504 to do benefit to the safety in utilization that improves the battery package.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A battery pack, comprising: accommodate including inside the main casing body of battery module (2) of battery package, still include detachably link firmly in additional casing (4) outside the main casing body, and because of link firmly on the main casing body, in additional casing (4) inside is formed with inclosed installation space, BDU (7) and BMS (8) of battery package are located in the installation space, and correspond to additional casing (4) position, in be equipped with on the main casing body for BDU (7) with BMS (8) with the electric connection component of electricity connection in the main casing.

2. The battery pack according to claim 1, wherein: the BDU (7) and the BMS (8) are fixed on the additional shell (4).

3. The battery pack according to claim 2, wherein: the electric connection assembly comprises a socket (6) fixedly connected to the main shell and a plug (5) matched with the socket (6) in a set mode, the socket (6) is electrically connected with the main shell, the plug (5) is connected with a BDU (7) and a BMS (8), the socket (6) is matched with the plug (5) to be provided with a high-voltage plug-in unit and a low-voltage plug-in unit, the high-voltage plug-in unit is formed by the BDU (7) and the main shell in an electric connection mode, and the low-voltage plug-in unit is formed by the BMS (8) and the main shell in an electric connection mode.

4. The battery pack according to claim 3, wherein: be equipped with BCM (101) in the main casing body, BMS (8) pass through low pressure grafting unit with BCM (101) electricity is connected.

5. The battery pack according to claim 3, wherein: the socket (6) is detachably and fixedly connected to the main shell, and a sealing part for sealing a gap between the socket (6) and the main shell is arranged between the socket and the main shell.

6. The battery pack according to claim 5, wherein: the sealing part comprises a sealing ring arranged on the socket (6), and the sealing ring is fixedly connected with the main shell along with the socket (6), and is clamped between the socket (6) and the main shell.

7. The battery pack according to claim 6, wherein: the socket (6) is fixedly connected to the main shell through a screw located on the outer side of the sealing ring.

8. The battery pack according to claim 1, wherein: the additional shell (4) is fixedly connected to the main shell through bolts.

9. The battery pack according to any one of claims 1 to 8, wherein: the top of the battery pack is provided with a water cooling plate (301), and the additional shell (4) is positioned at the bottom of the main shell.

10. The battery pack according to claim 9, wherein: the main casing body comprises a lower casing body (1) and an upper cover (3), the water cooling plate (301) is integrated on the upper cover (3), and the additional casing body (4) is fixedly connected to the bottom of the lower casing body (1).

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